ACP Atmospheric Chemistry and Physics ACP 1680-7324 Copernicus GmbH Göttingen, Germany 10.5194/acp-3-29-2003 A condensed-mass advection based model for the simulation of liquid polar stratospheric clouds Lowe D. 1 MacKenzie A. R. 1 Nikiforakis N. 2 Kettleborough J. 3 Lancaster University, UK DAMTP, Cambridge University, UK Rutherford Appleton Laboratory, UK 28 01 2003 3 1 29 38 This is an open-access article ditributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This article is available from http://www.atmos-chem-phys.net/3/29/2003/acp-3-29-2003.html The full text article is available as a PDF file from http://www.atmos-chem-phys.net/3/29/2003/acp-3-29-2003.pdf

We present a condensed-mass advection based model (MADVEC) designed to simulate the condensation/evaporation of liquid polar stratospheric cloud (PSC) particles. A (Eulerian-in-radius) discretization scheme is used, making the model suitable for use in global or mesoscale chemistry and transport models (CTMs). The mass advection equations are solved using an adaption of the weighted average flux (WAF) scheme. We validate the numerical scheme using an analytical solution for multicomponent aerosols. The physics of the model are tested using a test case designed by Meilinger et al. (1995). The results from this test corroborate the composition gradients across the size distribution under rapid cooling conditions that were reported in earlier studies.